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IS200AEADH3ACA — GE Speedtronic Mark VI AEAD Board
The IS200AEADH3ACA is a printed circuit board from GE's Speedtronic Mark VI / Mark VIe turbine control system, belonging to the IS200 board family. It is an AEAD-type module — a VME-format rack-mounted card that forms part of the signal interface layer inside the turbine control cabinet, connecting the control processors to field instrumentation.
The Mark VI and Mark VIe platforms are GE's turbine control systems, used to govern gas and steam turbines in power generation and industrial drive applications. Boards in the IS200 series act as the physical interface between the controllers and the field devices — sensors, transducers, and actuators. The IS200AEADH3ACA carries the "H3" board designation and an "ACA" revision suffix, distinguishing it from related AEAD variants such as the IS200AEADH1ADA.
Key Specifications
| Manufacturer | General Electric (GE) |
| Model / Part Number | IS200AEADH3ACA |
| Product Line | Speedtronic Mark VI / Mark VIe |
| Product Type | AEAD Board / Signal Interface Module |
| Board Family | IS200 series |
| Designation / Revision | H3 board, "ACA" revision suffix |
| Form Factor | VME-format card, rack-mounted in the control cabinet |
| Function | Field signal interfacing and I/O termination within the Mark VI/VIe system |
| Status | Legacy — available through GE and industrial spare-parts channels |
Important: Channel count, signal type (analog/digital), voltage ratings, and connector details for the IS200AEADH3ACA are not consistently documented across public sources. Please confirm these against the board label, GE documentation, or your system manual before ordering.
Product Functions
- Field signal interfacing: Connects field wiring from turbine instrumentation and devices into the Mark VI/VIe control system, forming part of the interface layer between the processors and the plant.
- Signal conditioning: Prepares raw field signals for the control processors, supporting accurate and reliable data acquisition from sensors and transducers.
- I/O support: Functions as an I/O interface board within the turbine control cabinet, contributing to the signal paths used by the control loop.
- Turbine control integration: Supports the monitoring and control functions essential to gas and steam turbine operation.
- Rack-mounted modular design: As a VME-format card, it slots into the control cabinet rack, allowing board-level replacement during maintenance without full system rewiring.
- System lifecycle support: Keeps existing Mark VI/VIe installations operational, supporting spares strategies for ageing turbine control systems.
Application Scenarios
- Gas turbine control: Signal interface within Mark VI/VIe control cabinets for gas turbine governor, sequencing, and protection systems.
- Steam turbine control: Field signal interfacing in steam turbine control applications.
- Power generation plants: Keeps legacy Mark VI/VIe turbine controls serviceable in utilities managing long-life assets.
- Oil & gas facilities: Support for turbine-driven compressors and mechanical drive applications under Mark VI/VIe control.
- Maintenance & overhaul: Sourced as a spare during scheduled outages to minimise downtime and rewiring effort.
- Legacy system lifecycle support: Supports spares and phased modernization strategies for plants still running Mark VI/VIe controls.
Frequently Asked Questions
What is the IS200AEADH3ACA?
It is an AEAD-type printed circuit board from GE's Speedtronic Mark VI / Mark VIe turbine control system (IS200 board family), functioning as a signal interface module mounted in the control cabinet rack.
Which systems is it compatible with?
It is designed for GE Speedtronic Mark VI / Mark VIe turbine control systems. It is not intended for Mark I, II, or V platforms or other unrelated control systems. Confirm the "H3" designation and revision suffix match your system.
How does it differ from other AEAD variants?
The AEAD family includes several variants differentiated by board designation (for example H1, H3, and H4) and revision suffix. The IS200AEADH3ACA is defined by its H3 designation and "ACA" suffix, so always match the complete part number to your requirement.
What technical details should I confirm before buying?
Channel count, signal type, voltage ratings, and connector configuration should be confirmed against the board label or GE documentation. Details vary between revisions and are not consistently published, so verification ensures a correct match.
Is it still available?
The Mark VI/VIe platform is a mature product. Boards in the IS200 series are generally available through GE and industrial spare-parts / repair specialists. Contact your supplier for current availability and lead time.
What should I verify before ordering a replacement?
Match the complete part number including the revision suffix, confirm the board designation corresponds to your cabinet position, and verify compatibility with your Mark VI/VIe firmware and system documentation. Providing a photo of the existing board to your supplier helps ensure a correct match.
